HP UX 11i Workload Management (gWLM/WLM) Software guide

Models: UX 11i Workload Management (gWLM/WLM) Software

This issue is most often a concern when a host is connected to both of the following items:

•A corporate LAN/WAN via one network interface card and IP address

•A second, private internal network and private IP address for communicating with a certain other set of hosts (such as cluster members)

Global Workload Manager attempts to detect and report network configuration issues that can cause undesirable behavior, but in some cases this detection occurs in a context that can be reported only into a log file.

Workaround

If you encounter some unexpected behavior (such as a gWLM agent that fails to update or report the status of its workloads), inspect the /var/opt/gwlm/glwmagent.log.0 file on the host for errors.

Incorrectly configured host name or IP address

You might see the following message in a log file (gwlmagent.log.0 or gwlmcmsd.log.0):

Unable to determine the network address and/or hostname

of the current host. This indicates a mis-configured network and/or a host name resolution issue for this host. For troubleshooting information, see the HP Matrix Operating Environment Release Notes and search for this message.

The most common cause for this error is a problem in the host name configuration file in /etc/ hosts (or equivalent on Windows) or incorrect settings of the /etc/nsswitch.conf file (HP-UX only).

Background information

gWLM is not a simple client/server application. It involves:

•Multiple managed-node “servers” (the set of gWLM agents in an SRD are all peer servers that cooperatively manage the SRD)

•The CMS management server handling configuration and monitoring

Under normal operation, all of these components need complete connectivity. At a minimum, gWLM requires that each host have a primary IP address/host name that is reachable from every other interacting gWLM component--the CMS and all gWLM agents in a single SRD. (gWLM agents in multiple SRDs need not have connectivity within undeployed SRDs.)

By default, gWLM uses the primary IP address/host name for a given host. However, you can set up a management LAN. To use other IP addresses/host names, see “Using gWLM with Hosts on Multiple LANs” (page 47).

Workaround

Correct the configuration of the host so that:

•The primary fully qualified domain name can be properly resolved (by DNS or by configuration files)

•The IP address and primary fully qualified domain name are consistent for the host—and do not resolve to a local-host address (for example, 127.0.0.1)

The procedure below explores one way to check the host's configuration.

1.Run the vseassist tool to perform initial network configuration checks.

2.To validate proper configuration on HP-UX, try the following steps: a. Get the current host name using the hostname command:

[mysystem#1] > hostname mysystem

b.Get the IP address configured for the host using nslookup:

Incorrectly configured host name or IP address 49

UX 11i Workload Management (gWLM/WLM) Software specifications

HP-UX 11i Workload Management (gWLM/WLM) software is an integral component of HP's premier UNIX operating system, designed to enhance system performance and resource management across diverse workloads. This advanced tool allows system administrators to monitor, control, and allocate resources effectively to achieve optimal performance, reliability, and service levels in enterprise environments.

One of the main features of gWLM/WLM is its ability to classify workloads and manage them according to specific policies set by the administrator. By using service level objectives (SLOs), administrators can define the performance criteria for various applications and workloads. gWLM continuously tracks these workloads, ensuring that they adhere to the defined SLOs, thus maintaining a high level of application performance.

The software employs resource pools, which segment resources such as CPU, memory, and I/O bandwidth among different workloads based on predefined priorities. This capability ensures that critical applications receive the resources they require, even during peak usage periods, thereby preventing resource starvation that could lead to system slowdowns or crashes.

Another significant characteristic of gWLM/WLM is its real-time monitoring and reporting capabilities. The software provides detailed insights into resource utilization, workload performance, and system health. Administrators can access this information through a user-friendly interface, allowing for informed decision-making and proactive management.

Integration with HP Serviceguard adds another layer of functionality, enabling high availability for critical applications. gWLM can orchestrate workload migration to ensure that service levels are maintained, even in the event of hardware failures or resource contention.

The technology behind gWLM/WLM is built on advanced algorithms that leverage historical data and predictive modeling to optimize resource allocation dynamically. This means that as workloads change, the system can automatically adjust resource distribution to meet performance targets without the need for constant manual intervention.

gWLM also supports integration with various enterprise management tools, enabling administrators to implement comprehensive monitoring and management strategies across the IT infrastructure. The scalability of gWLM allows organizations of all sizes to benefit from its robust workload management features, ensuring that they can adapt to changing demands in their operational environments.

In summary, HP-UX 11i Workload Management software offers a sophisticated solution for optimizing resource utilization, managing workloads effectively, and maintaining high performance in complex enterprise environments. Its comprehensive features and technologies make it an essential tool for any organization seeking to enhance their IT operations.